Electrical computers and digital processing systems: support – Multiple computer communication using cryptography – Particular communication authentication technique
Reexamination Certificate
2007-06-05
2007-06-05
Peeso, Thomas R. (Department: 2132)
Electrical computers and digital processing systems: support
Multiple computer communication using cryptography
Particular communication authentication technique
C713S168000, C713S171000, C713S176000, C713S182000
Reexamination Certificate
active
10021331
ABSTRACT:
A ticket issuing device issues a highly convenient electronic ticket. The electronic ticket is formed of validity data and information to be validated. The validity data includes a secret key to which an algorithm whose presence is verifiable without being exposed is applicable. The information to be validated includes a public key corresponding to the secret key for verifying the presence of the secret key. The information is validated by the validity data. A ticket storage device generates a digital signature for verifying the presence of the secret key in the validity data, and sends the digital signature together with the information to be validated to a ticket checking device. The ticket checking device determines the presence of the secret key in the ticket storage device by using the digital signature from the ticket storage device and the public key contained in the information to be validated.
REFERENCES:
patent: 5389738 (1995-02-01), Piosenka et al.
patent: 5563946 (1996-10-01), Cooper et al.
patent: 5625690 (1997-04-01), Michel et al.
patent: 5757917 (1998-05-01), Rose et al.
Frommer William S.
Frommer & Lawrence & Haug LLP
Peeso Thomas R.
Presson Thomas F.
Sony Corporation
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